The Thermos NS105BK004 features vacuum insulated technology for maximum temperature retention, hot or cold. Features also include leak proof lid with a one hand push operation, unbreakable stainless interior and exterior, and it's dishwasher safe.

This mug holds 16oz of coffee and keeps is hot for more than three hours. It stays so hot that I have to sip even at the three hour point. There will be no gulping of coffee without scalding yourself. I bought one for myself, my mother-in-law and a work buddy wanted one after seeing mine. The spill proof seal is great too.